Improvement in lamps



ARNOLD & BLACKMAN.

Lamp. No. 74,271. Patented Feb. 11, 1868.

INVENTOR.

WITNESSES. harz a:

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IMPROVEMENT IN LAMPS.

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Be it known that we, Anonzo G. ARNOLD and EBnNEznn B'LAcKMAN, both ofthe town of Norwalk, county of Fairfield, and State of Connecticut, haveinvented a new and useful Improvement in the Mode of ConstructingLamp-Glasses and Arrangements for Attaching the same to Lamps; and we doherebydeclare that the following is-a full and correct descriptionthereof, reference being had to the accompanyingdrawing and to theletters of reference marked thereon. V

The nature of our invention consists in an improved shape of the glasschimney, and the arrangement for attaching the same to the lamp. i v

' To enable others skilled in the art to make and use our invention, wewill proceed to describe the same. The Drawing.

Figure 1 is a view of a lampwith the glass chimney placed on.the same,and the arrangements for attaching the'top, springs, 8m. i A is asection of the glass chimney, which we make to rise up vertically fromthe bottom or base part, about three-fourths of an inch, and then forman indentation, C, or neck to receive the end of'the four verticalsprings D, which are made with a curved catch, at theupper end E, tocorrespond and pass-into the indentation C to hold on the glass chimneyA, and the tension of the springs and catch E is regulated to thenecessary strength required to prevent the chimne from toppling overwhen the lamp is held in an extremely inclined position; also, soregulated that the chiiii ney can be easily removed and replaced. Fromand above the neck G the glass takes a globular shape and tapers to thetop, the same as usual. The metallic device F, to support the chimney,we make with the usual screw for attaching, and the mode of raising andlowering the wick is the same as other lamps. The part to receive theglass and cone we make flat at G, but sunk dowuwithin the circumference.of the conc B, for the ventilating-perforations. The springs D areattached to the'outer edge of t the flat part G, rising upperpendicularly from the same. The perforations are all within thecircle of the cone B, so that the air for combustion passes within thesame, directly to the base of the flame, and by that means is more fullyconsumed, and makes it less liable to smoke, and by the air passingwithin the cone it keeps it cool, and also the base ofthe glass is butslightly afi'ected by theheat of the heme.

The utility of our improvement is in the facility of removing andreplacing the chimney, and the light is thrown downwards withoutobstruction; also, the cone and base of the glass remaining all the timecomparatively cool.

What we claim as our invention, and desire to secure by Letters Patent,is-

The glass chimney A, formed as herein described, in combination with thearrangements of the vertical springs D,' flat perforated base G, andcone B, in the manner substantially as and for the purpose herein setforth ALONZO G. ARNOLD, EBENEZER BLAUKMAN.

Witnesses:

WM. VINE, JOSEPH F. Foorn.

